Vibrators for dental use



June 1964 K. A. s. KARLSTROM ETAL 3,138,365

VIBRATORS FOR DENTAL USE Filed March 23, 1962 I tum" United States Patent 3,138,366 VIBRATORS FOR DENTAL USE Karl Axel Sam Karlstrom, 37 Nygatan, Gavle, Sweden, and Karl Gustaf )stberg, deceased, late of Rotehro, Sweden, by Ingrid Johanna Cecilia Allard, Rotebro, and Elsie Anna Marianne ijstberg, Stockholm, Sweden, heirs; said heirs of said flstberg assignors to said Karlstrom Filed Mar. 23, 1962, Ser. No. 182,143 6 Claims. (Cl. 259-1) The present invention refers to such vibrators for dental use, in which the vibrations are created by a rolling body enclosed within a tube, said body being adapted to be 0perated from an axle inserted into one end of the tube, a vibrating motion being transmitted to a vibrator head arranged at the other end of the tube and from this vibrator head onto a holder exchangeably arranged on said head and adapted to support the object to be vibrated. Said holder may consist of a container, a casting mould or the like for the material to be vibrated. The invention refers to a means for mounting said holder rigidly on the vibrator head by means of a joint which allows exchange or adjustment of the holder but otherwise forms a butt joint between the vibrator head and the holder.

The invention will be described more closely with reference to the accompanying drawing, which illustrates various forms of embodiment of a vibrator with appurtenant mounting means. FIG. 1 shows the arrangement in a plan view and FIG. 2 the same in a vertical side view taken in the plane indicated by the line II-II in FIG. 1 and showing a casing mould mounted on the holder. FIG. 3 is a lateral view partly in section along a plane extending through the longitudinal axis of the vibrator as indicated by the line III-III in FIG. 1.

The movable parts of the vibrator are arranged in a special manner within a cylindrical tube 1, which preferably consists of metal. Said tube is secured with the rear end 2 thereof in a bore in a block 3 of an elastic material, such as rubber, in such manner that the fore end 4 thereof, which forms the vibrator head, may perform an oscillatory motion about the point of attachment. Said fore end 4 protrudes outside the lateral surface 5 of the block 3, which is provided with a wedge-shaped recess 6 extending transversely through the entire block, and in which the vibrator head is freely movable.

The object to be vibrated is constituted in this case by an impression spoon 7, which by means of a bridge 8 and screws 9, 10 is secured to a mounting plate or a table 11, which in turn is rigidly connected with the vibrator head by means of a clamping means, which in the example shown consists of a screw bolt 12 and of a nut 13 threaded onto the bolt, as Well as of a pin 14 extending through said bolt. The screw bolt 12 is riveted with its upper end to the plate 11 and is inserted into an aperture extending diametrically through the vibrator head, the ends of the pin 14 resting in depressions provided in the vi brator tube. In tightening the nut 13 arranged at the lower end of the bolt 12 against the lower side of the vibrator tube, the bolt is clamped by means of the pin 14 to the tube in a non-rotatable position relatively to the tube, whereby a butt joint is obtained between the bolt and the vibrator head. As the bolt 12 is rigidly connected to the plate 11, and the impression spoon is rigidly connected with the plate 11 through the connection 8, 9, 10, the vibrations of the vibrator head will be transmitted to the impression spoon through a perfect butt joint.

By reason of the vibrations the nut 13 would come loose, and the butt joint become disconnected, if no special arrangements were undertaken for the locking of the nut on the bolt. This is effected in a simple manner according to the invention by the nut 13 being brought into frictional engagement with the lateral surfaces of the wedge-shaped recess 6, which brought about in connection with the insertion of the vibrator into the block through an axial displacement of the vibrator tube in a direction toward the point of attachment, until the nut 13 bears against the lateral surfaces. By a corrugation of the cylindrical surface of the nut 13, the latter will be effectively locked against the elastic lateral surfaces of the recess 6. Upon removal of the vibrator out of the block, the connection 12., 13, 14 with the vibrator head may be loosened by unscrewing of the nut 13.

As shown in FIG. 3, the plate 11 is provided with a plane elongation 15 forming an angle with the remaining part of the plate. As shown in dotted lines in FIG. 1, the elongation 15 is in the same manner as the part 11 provided with screw holes. By using these holes for the fastening of the impression spoon by means of the screws 9, 10, the angular position of the impression spoon may be changed. Thus in case the cooling water tube 16, 17 forming a larger angle than the bottom of the impression spoon, the latter may be mounted so as to take up a horizontal position. When such a spoon is used, the bolt and the plate 11 are first turned by so that the parts 11 and 15 exchange places, whereupon the nut 13 is loosened up and the spoon is mounted on the part 15 with the aid of the bridge 8 and the screws 9, 10. When required, the plate 11 may obviously be adapted to be adjusted and fastened in more than two angular positions, the bolt 12 being then adapted to be fixed by engagement of the pin 13 into a corresponding number of recesses in the vibrator tube.

The detachable connection between the vibrator head and the plate 11 may obviously be constructed otherwise than as a screw connection. It is important only that the parts permit of being clamped to one another, so that a butt joint is obtained, the clamping means having to be locked in the manner described by being brought into engagement with suitable surface portions of the block 3.

What is claimed is:

l. A mounting assembly for dental vibrators comprising a block-shaped supporting body of resilient material, a tubular vibrator one end of which is inserted in said supporting body while the other end, forming a vibrator head, is free, to swing outside one side surface of said supporting body, a container for the material to be vibrated, a mounting plate carrying said container, a screw bolt carrying said mounting plate and inserted in a transverse aperture provided in the vibrator head, a nut on said bolt for connecting said bolt with the vibrator head, and means for locking said nut in its tightened position by frictional engagement with the adjacent side surface of said supporting body.

2. A mounting assembly as claimed in claim 1, in which said supporting body is provided with a wedgeshaped recess and in which the vibrator tube is displaceable longitudinally in the supporting body and the vibrator head is freely movable in said wedge-shaped recess, said nut being held in contact with the side surfaces of the wedge-shaped recess by pressure produced by compression of the supporting body in pushing the vibrator into its operative position in said supporting body.

3. A mounting assembly for dental vibrators comprising a block-shaped supporting body of resilient material, a tubular vibrator one end of which is inserted in said supporting body While the other end, forming a vibrator head, is free to swing outside one side surface of said supporting body, a container for the material to be vibrated, a mounting plate carrying said container, a bolt carrying said mounting plate and inserted in a transverse aperture provided in said vibrator head so as to be turnable into diiferent angular positions in relation to the vibrator head,

means for holding the bolt in different angular positions and means for rigidly fixing the bolt in each angular position.

4. A mounting assembly asclaimed in claim 3, in which said mounting plate has" two seats for the attachment of said container and which said bolt carrying said mounting plate is angularly adjustable into two corresponding positions.

5. A mounting assembly for a vibrator comprising a block-shaped supporting body of resilient material having a hole therein and a recess at one end of said hole, a tubular vibrator having one end inserted in said hole in the supporting body and having the opposite end, forming a vibrator head projecting from said hole and having a portion in said recess, said portion having a transverse hole therethrough, a bolt extending through said transverse hole in the vibrator head and having an abutment engaging one side of said head, a nut on said bolt engaging the opposite side of said vibrator head and tightenable to secure said bolt in fixed rotational position with respect to said vibrator head, said nut engaging the sides of said recess to restrain said nut against loosening, said bolt having an end projecting laterally from said vibrator head, a mounting,- plate fixed on said projecting end of the bolt and meansformounting an object to be vibrated on said plate.

6. A mounting assembly according to claim 5, in which said mounting plate has two portions disposed at an angle to one another and in which said mounting means cooperates with said plate to mount the object to be vibrated selectively on either of said angularly disposed portions of said mounting plate.

References Cited in the file of this patent UNITED STATES PATENTS 2,728,562 Bailey Dec. 27, 1955 3,081,980 Karlstrom et al. Mar. 19, 1963 

1. A MOUNTING ASSEMBLY FOR DENTAL VIBRATORS COMPRISING A BLOCK-SHAPED SUPPORTING BODY OF RESILIENT MATERIAL, A TUBULAR VIBRATOR ONE END OF WHICH IS INSERTED IN SAID SUPPORTING BODY WHILE THE OTHER END, FORMING A VIBRATOR HEAD, IS FREE, TO SWING OUTSIDE ONE SIDE SURFACE OF SAID SUPPORTING BODY, A CONTAINER FOR THE MATERIAL TO BE VIBRATED, A MOUNTING PLATE CARRYING SAID CONTAINER, A SCREW BOLT CARRYING SAID MOUNTING PLATE AND INSERTED IN A TRANSVERSE APERTURE PROVIDED IN THE VIBRATOR HEAD, A NUT ON SAID BOLT FOR CONNECTING SAID BOLT WITH THE VIBRATOR HEAD, AND MEANS FOR LOCKING SAID NUT IN ITS TIGHTENED POSITION BY FRICTIONAL ENGAGEMENT WITH THE ADJACENT SIDE SURFACE OF SAID SUPPORTING BODY. 